Timepiece intended to indicate the power reserve

Abstract

A horological instrument intended to indicate the power reserve, includes a barrel ( 1 ) provided with a drum ( 2 ) arranged to turn in one direction during operation of the horological instrument, the drum ( 2 ) including around the periphery thereof at least one power reserve scale ( 4 ). At least one hand ( 13 ) is arranged to turn with the drum ( 2 ) and cooperates with a corresponding power reserve scale ( 4 ). Furthermore, a mechanism for displacing the hand or hands ( 13 ) is arranged to displace the hand or hands by one step with respect to the corresponding scale of the drum ( 2 ) with each revolution or with each fraction of revolution of the drum ( 2 ) and the hand ( 13 ) in order to progressively indicate the power reserve.

The invention claimed is: 
     
       1. A horological instrument for indicating power reserve, including:
 a barrel ( 1 ) provided with a drum ( 2 ) arranged to turn in one direction during operation of the horological instrument, the drum ( 2 ) including on its periphery at least one power reserve scale ( 4 ) which extends around the periphery of the drum ( 2 ), 
 at least one hand ( 13 ) arranged to turn with the drum ( 2 ) and which cooperates with a corresponding power reserve scale ( 4 ) located on the periphery of the drum ( 2 ), and 
 a mechanism for displacing the hand or hands ( 13 ) arranged to displace the hand or hands by one step with respect to the corresponding scale of the drum ( 2 ) with each revolution or with each fraction of revolution of the drum ( 2 ) and the hand ( 13 ) in order to progressively indicate the power reserve on the periphery of the drum ( 2 ), 
 wherein the barrel ( 1 ) drives a part ( 6 ) including one finger or several fingers ( 14 ,  15 ) distributed around the periphery thereof, this finger or these fingers ( 14 ,  15 ) drive with each revolution or each fraction of revolution a satellite wheel ( 7 ) carried by the cover ( 3 ) of the drum ( 2 ), said satellite wheel ( 7 ) being connected to a rotatable member carrying said at least one hand ( 13 ) in order to displace this rotatable member by one step for each revolution or each fraction of revolution, and 
 wherein the part ( 6 ) includes two diametrically opposite fingers. 
 
     
     
       2. The horological instrument according to  claim 1 , wherein the scale or scales ( 4 ) indicate(s) an increasing power reserve in the direction of rotation of the drum ( 2 ), and the mechanism for displacing the hand or hands is arranged to displace the hand or hands by one step at each revolution or fraction of revolution of the drum ( 2 ) in the direction opposite to the rotation direction of the drum ( 2 ). 
     
     
       3. The horological instrument according to  claim 1 , wherein the satellite wheel is maintained by a pawl ( 9 ) allowing it to advance by one step for each revolution or fraction of revolution. 
     
     
       4. The horological instrument according to  claim 1 , including on the one hand four scales ( 4 ) distributed in an equidistant manner on the drum ( 2 ) of the barrel ( 1 ), and including on the other hand a spider hand system ( 16 ) provided with four hands ( 13 ) maintained by four perpendicular arms ( 12 ) and secured to a wheel ( 11 ) called display wheel, the four hands ( 13 ) each indicating the remaining power reserve on any of the four scales ( 4 ). 
     
     
       5. The horological instrument according to  claim 1 , wherein the power reserve is indicated on the scale or each scale ( 4 ) by a graduation in days. 
     
     
       6. The horological instrument according to  claim 5 , wherein the scale or each scale ( 4 ) indicates a power reserve that can go up to 15 days. 
     
     
       7. The horological instrument according to  claim 1 , wherein said horological instrument is a clock. 
     
     
       8. The horological instrument according to  claim 7 , wherein the barrel ( 1 ) is housed in a rear portion of the clock, the rear and lateral portions of the clock being open or transparent or accessible by a door in such a manner as to make the drum ( 2 ) and the scale or scales ( 4 ) visible.